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An electric energy quality regulator

A power quality and regulator technology, applied in AC network voltage adjustment, electrical components, circuit devices, etc., can solve the problems of large volume and weight, reduce flicker level, etc., and achieve small volume, light weight, and flexible application occasions Effect

Inactive Publication Date: 2007-10-03
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main features of UPQC are: filtering harmonics, reactive power compensation, reducing flicker level, etc. (Research on Power Quality Control Center and Unified Power Quality Regulator [J], Electric Power Automation Equipment, 2003, 23(9): 10~14 ), the disadvantage is that two power frequency transformers are used, and the volume and weight are relatively large

Method used

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  • An electric energy quality regulator
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Examples

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example 1

[0027] Example 1: A single-phase power quality conditioner based on structure 1 (as shown in Figure 2).

[0028] The line voltage level is 6300V and the capacity is 1000kVA. In Figure 2, the primary side AC / AC converter 1 is composed of four bidirectional switches, and each bidirectional switch is composed of two 3300V / 100A one-unit IGBT (Insulated Gate Bipolar Transistor) modules connected in reverse series, through the primary side AC / AC conversion 1, the power frequency AC voltage is modulated into a high-frequency AC voltage of 6k Hz; the high-frequency transformer 2 in Figure 2 is designed according to 200kVA, and the switching frequency is 6k Hz; the secondary side AC / AC converter 3 is composed of 4 bidirectional switches, each The bidirectional switch is composed of two 1700V / 400A one-unit IGBT (Insulated Gate Bipolar Transistor) modules connected in reverse series.

[0029] Example 2: A single-phase power quality conditioner based on structure 2 (as shown in Figure 3)...

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Abstract

This invention discloses an electricity power quality adjuster, which comprises a primary voltage converter, high-frequency converter and secondary voltage converter. The input power alternating voltage signals are modulated into high-frequency voltage signals through primary voltage converter; the high frequency signals are coupled to the transformer secondary part through high-frequency signals; the secondary high-frequency signals are restored to the power frequency voltage signals through secondary voltage converter; the power voltage signals and the electricity quality adjuster input ends overlapped with each other to get the output voltage of the adjuster.

Description

technical field [0001] The invention relates to a power quality adjustment technology in a power system, in particular to a power quality regulator. Background technique [0002] Power quality is a general term for many single-type power system interference problems. It is essentially voltage quality, which mainly describes the degree to which the power supply voltage deviates from its ideal state. Its content involves frequency offset, voltage offset, electromagnetic transient, waveform distortion, three-phase Unbalance and voltage fluctuation and flicker etc. [0003] Power quality is an important indicator of power system operation, and it is of great significance to both the power grid and users. At present, there are various nonlinear and asymmetric loads in the power system, which seriously affects the power quality. However, in modern industry and commerce, due to the increasingly widespread application of robots, automated production lines, precision CNC machine to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/01H02J3/14H02J3/18H02M5/00
CPCY04S20/222Y02B70/3225Y02E40/30Y02E40/40
Inventor 范澍毛承雄陆继明王丹成建鹏
Owner HUAZHONG UNIV OF SCI & TECH